Lock primitives should have a 'is_locked()' function.

[Arignir]

Lock primitives (spinlock, mutex, semaphore, rwlock) should all have their is_locked() function.

This could be used in debugging assertions to make sure some golden rules are respected all along the kernel (lots of functions are assuming that some datas are already locked etc.).

Biggest beneficiaries are the vaspace_* functions. They assumes current thread and current virtual address space are both locked as writers. If they aren't, undefined behavior may occur.

[Gaspard--]

is_locked would be proper english, so use that please 🙏

[Arignir]

I have updated the issue's description. Thanks. 👍